Date: Thu, 23 Apr 1998 11:25:05 -0400 (EDT) From: "David E. Cross" <dec@phoenix.its.rpi.edu> To: Alfred Perlstein <perlsta@fang.cs.sunyit.edu> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Protected mode instructions which reduce to noop. Message-ID: <Pine.BSF.3.96.980423112432.9592C-100000@phoenix.its.rpi.edu> In-Reply-To: <Pine.BSF.3.95.980423101923.15642A-100000@fang.cs.sunyit.edu>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, 23 Apr 1998, Alfred Perlstein wrote: > i'm seriously doubtful of this. i think intels throw instr fault > exceptions when stuff like that is executed. > > -Alfred > > On Thu, 23 Apr 1998, David E. Cross wrote: > > > Awhile ago it was discussed about implimenting a VM type architecture on > > intel, and it was agreed that this would be very difficult because intel > > had decided that instead of throwing an illegal instruction exception for > > protected mode instructions that were not run as supervisor, it would > > simply reduce the instriction to NOOP. What are these instructions. > > Heh, I just read my own post... it was not *all* protected mode instructions, but *some* of them. -- David Cross To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.3.96.980423112432.9592C-100000>